summaryrefslogtreecommitdiffstats
path: root/net/mac80211/pm.c
blob: 81985d27cbdaf5d64e22701aac01249d193dc1a5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
#include <net/mac80211.h>
#include <net/rtnetlink.h>

#include "ieee80211_i.h"
#include "led.h"

int __ieee80211_suspend(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_sub_if_data *sdata;
	struct ieee80211_if_init_conf conf;
	struct sta_info *sta;
	unsigned long flags;

	ieee80211_stop_queues_by_reason(hw,
			IEEE80211_QUEUE_STOP_REASON_SUSPEND);

	flush_workqueue(local->hw.workqueue);

	/* disable keys */
	list_for_each_entry(sdata, &local->interfaces, list)
		ieee80211_disable_keys(sdata);

	/* Tear down aggregation sessions */

	rcu_read_lock();

	if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
		list_for_each_entry_rcu(sta, &local->sta_list, list) {
			set_sta_flags(sta, WLAN_STA_SUSPEND);
			ieee80211_sta_tear_down_BA_sessions(sta);
		}
	}

	rcu_read_unlock();

	/* remove STAs */
	if (local->ops->sta_notify) {
		spin_lock_irqsave(&local->sta_lock, flags);
		list_for_each_entry(sta, &local->sta_list, list) {
			if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
				sdata = container_of(sdata->bss,
					     struct ieee80211_sub_if_data,
					     u.ap);

			local->ops->sta_notify(hw, &sdata->vif,
				STA_NOTIFY_REMOVE, &sta->sta);
		}
		spin_unlock_irqrestore(&local->sta_lock, flags);
	}

	/* remove all interfaces */
	list_for_each_entry(sdata, &local->interfaces, list) {
		if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
		    sdata->vif.type != NL80211_IFTYPE_MONITOR &&
		    netif_running(sdata->dev)) {
			conf.vif = &sdata->vif;
			conf.type = sdata->vif.type;
			conf.mac_addr = sdata->dev->dev_addr;
			local->ops->remove_interface(hw, &conf);
		}
	}

	/* flush again, in case driver queued work */
	flush_workqueue(local->hw.workqueue);

	/* stop hardware */
	if (local->open_count) {
		ieee80211_led_radio(local, false);
		local->ops->stop(hw);
	}
	return 0;
}

int __ieee80211_resume(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_sub_if_data *sdata;
	struct ieee80211_if_init_conf conf;
	struct sta_info *sta;
	unsigned long flags;
	int res;

	/* restart hardware */
	if (local->open_count) {
		res = local->ops->start(hw);

		ieee80211_led_radio(local, hw->conf.radio_enabled);
	}

	/* add interfaces */
	list_for_each_entry(sdata, &local->interfaces, list) {
		if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
		    sdata->vif.type != NL80211_IFTYPE_MONITOR &&
		    netif_running(sdata->dev)) {
			conf.vif = &sdata->vif;
			conf.type = sdata->vif.type;
			conf.mac_addr = sdata->dev->dev_addr;
			res = local->ops->add_interface(hw, &conf);
		}
	}

	/* add STAs back */
	if (local->ops->sta_notify) {
		spin_lock_irqsave(&local->sta_lock, flags);
		list_for_each_entry(sta, &local->sta_list, list) {
			if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
				sdata = container_of(sdata->bss,
					     struct ieee80211_sub_if_data,
					     u.ap);

			local->ops->sta_notify(hw, &sdata->vif,
				STA_NOTIFY_ADD, &sta->sta);
		}
		spin_unlock_irqrestore(&local->sta_lock, flags);
	}

	/* Clear Suspend state so that ADDBA requests can be processed */

	rcu_read_lock();

	if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
		list_for_each_entry_rcu(sta, &local->sta_list, list) {
			clear_sta_flags(sta, WLAN_STA_SUSPEND);
		}
	}

	rcu_read_unlock();

	/* add back keys */
	list_for_each_entry(sdata, &local->interfaces, list)
		if (netif_running(sdata->dev))
			ieee80211_enable_keys(sdata);

	/* setup RTS threshold */
	if (local->ops->set_rts_threshold)
		local->ops->set_rts_threshold(hw, local->rts_threshold);

	/* reconfigure hardware */
	ieee80211_hw_config(local, ~0);

	netif_addr_lock_bh(local->mdev);
	ieee80211_configure_filter(local);
	netif_addr_unlock_bh(local->mdev);

	/* Finally also reconfigure all the BSS information */
	list_for_each_entry(sdata, &local->interfaces, list) {
		u32 changed = ~0;
		if (!netif_running(sdata->dev))
			continue;
		switch (sdata->vif.type) {
		case NL80211_IFTYPE_STATION:
			/* disable beacon change bits */
			changed &= ~IEEE80211_IFCC_BEACON;
			/* fall through */
		case NL80211_IFTYPE_ADHOC:
		case NL80211_IFTYPE_AP:
		case NL80211_IFTYPE_MESH_POINT:
			/*
			 * Driver's config_interface can fail if rfkill is
			 * enabled. Accommodate this return code.
			 * FIXME: When mac80211 has knowledge of rfkill
			 * state the code below can change back to:
			 *   WARN(ieee80211_if_config(sdata, changed));
			 *   ieee80211_bss_info_change_notify(sdata, ~0);
			 */
			if (ieee80211_if_config(sdata, changed))
				printk(KERN_DEBUG "%s: failed to configure interface during resume\n",
				       sdata->dev->name);
			else
				ieee80211_bss_info_change_notify(sdata, ~0);
			break;
		case NL80211_IFTYPE_WDS:
			break;
		case NL80211_IFTYPE_AP_VLAN:
		case NL80211_IFTYPE_MONITOR:
			/* ignore virtual */
			break;
		case NL80211_IFTYPE_UNSPECIFIED:
		case __NL80211_IFTYPE_AFTER_LAST:
			WARN_ON(1);
			break;
		}
	}

	ieee80211_wake_queues_by_reason(hw,
			IEEE80211_QUEUE_STOP_REASON_SUSPEND);

	return 0;
}